Dental nerve-broach



T. W. JONES.

DENTAL NERVE BROACH APPLICATION FILED JUNE 11, 1-920.

1,369, 1 1 2. Patented Feb. 22, 1921.

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TRUMAN WM. JONES, OF GOATESVILLE, PENNSYLVANIA DENTAL nnavnnnoncrr.

Specification of Letters Patent.

Patented Feb. 22, 1921.

Application filed Iune 17, 1920. Serial No. 389,542.

(.loatesville, in the county of Chester and State of Pennsylvania, haveinvented certain new and useful Improvements in Dental Nerve-Breaches,of which the following is a specification.

Dentists often find it difficult to manipulate nerve breaches during theaction of withdrawing a nerve from the nerve cavity of a tooth in viewof the fact that the saliva from the patients mouth often coats thefinger-engaging portlon of the broach and thereby renders it slipperyand in view of the necessary smallness of these broaches they very oftenslip or do not respond to the twisting or moving action of thedentistfor the reason that the dentist cannot secure suiiicient finger gripupon the broach to enable him to manipulate it in a positive and desiredmanner.

One ob'ect of m r invention is to irovide a nerve broach which willinsure a positive and secure finger grip when being used.

Another object is to so make my improved nerve broach that the fingergripping handle can be produced by the bending of the wire from whichthe main or stem portion is constructed without greatly adding to theweight of the broach.

These objects, and other advantageous ends which will be describedhereinafter, I

line 5-5 of Fig. 1, and

Fig. 6 is a perspective view of my -im-' proved nerve broach.

Referring to the drawings, my improved nerve broach can be made from asingle piece of wire and tapered at one end and I provided with barbs 7in the usual manner. The opposite end of the wire is bent downwardly toprovide a portion 8 which is spaced from the main stem 9 and thisportion 8 is bent at 10 to provide an upwardly projectingextension'l1;the extreme end 12 or said extension being preferably arrangedsubstantially at the same level with the bowed top 13 which is producedwhen making the portion 8. The bend 10 is made preferably in a plane atan angle to the plane of bend of the part 13 and a handle 14 is thusproduced which permits a part of the fingers to project into the spacesbetween the stem 9 and portion 8 and between the porti0n'8 and theextension 11; thus insuring a secure finger purchase by the dentistwhile using the broach.

The construction ofmy improved broach as above described is such thatduring use a portion of the skin or flesh of the dentists fingers willenter or bulge into the longi tudinal spaces between the longitudinalbent portions of the handle and thereby provide a sure grip for thefingers and guard against accidental slipping of the broach during itsrequired turning action when removing a nerve from the nerve cavity of atooth. Furthermore by constructing the handle as above specified atwisting action thereo'fwill impart a slight eccentric action of thebarbed main stem 9 and thereby serve to clean the wall of the nervecavity of a tooth and to remove any part of the nerve which ispositioned out of the central part of the cavity.

While I have described my invention as taking a particular form, it willbe understood that the various parts of my invention may be changedwithout departing from the spirit thereof, and hence I do not limitmyself to the precise construction set forth, but

[consider that I am at liberty to make such changes and alterations asfairly come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is l. A nerve broach made of wire and includingan end portion forming a main stem, the opposite end of said wire beingbent downward in substantially parallel spaced relation to said stem andthen bent upwardly to provide an extension in spaced relation to saidstem and firstmentioned spaced portion to insure a good finger grippingportion which when turned imparts a slight eccentric movement to saidstem; sub stantially as described.

2. A nerve broach made of wire and ineluding an end portion forming amain stem, the opposite end of said wire being bent downward in spacedrelation to said stem and then bent upwardly to provide an extension inspaced relation to said stem and first mentioned spaced portion, saidstem and first mentioned spaced portion being in a plane extending at anangle to the plane including said first mentioned por- 10 tion and saidextension to insure a good finger gripping portion which when turnedimparts a slight eccentric movement to said stem; substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of 15 two subscribing witnesses.

TRUMAN WM. JONES. Witnesses ELIZABETH GARBE, CHAs. E. Poms.

